Previous in Forum: Want a Million Bucks?   Next in Forum: Diesel Generator
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
10 comments
Rate Comments: Nested
sarfaras
Participant

Join Date: Mar 2014
Posts: 3

Air Conditioning

07/30/2014 12:25 AM

Any idea about thermal load calculations.......
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Good Answers:

These comments received enough positive votes to make them "good answers".

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
lyn
Guru

Join Date: Oct 2008
Posts: 42355
Good Answers: 1693
#1

Re: Air conditioning

07/30/2014 12:44 AM

Yes, heat makes you hot. Go figure.

About 19,700,000 results (0.28 seconds) when I searched "thermal load calculations".
Register to Reply
Tornado
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 21017
Good Answers: 795
#2

Re: Air conditioning

07/30/2014 12:49 AM

Q = k A (LMTD).

That's all ye know, and all ye need to know.

--John Keats

__________________
 In vino veritas; in cervisia carmen; in aqua E. coli.
Register to Reply
sarfaras
Participant

Join Date: Mar 2014
Posts: 3
#3

Re: Air conditioning

07/30/2014 1:04 AM

i mean to say, there is chart in thermal load calculation in which two three terms that i don't know..like TMBH,SMBH,EER,PUF ext.....

and also is there any defference between watts in electrical and airconditioning ...dat i got 1 TR = 1350 watts (electrical)

and 1 TR = 3250 watts ( in air conditioning )
Register to Reply
3
Tornado
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 21017
Good Answers: 795
#4
In reply to #3

Re: Air conditioning

07/30/2014 1:32 AM

It is more complicated than that. For thermal conversion, 1TR = 12,000 Btu/h, 1 W = 3.415 Btu/h, and thus 1 TR = 3514 W. (The approximately = symbol does not work lately, so I apologize for the straight =.)

Electrically, it depends on the evaporating and condensing temperatures. For air-conditioning, where TE ~= 2dC, your number of 1350 W is about right. For colder TE, the wattage increases. The ratio of thermal to electrical wattage is called COP (coefficient of performance).

__________________
 In vino veritas; in cervisia carmen; in aqua E. coli.
Register to Reply Good Answer (Score 3)
No more Good Answers. Go to first "Almost" Good Answer
Wrench twirler
Power-User

Join Date: Jul 2014
Location: Savannah, GA. The post office decided to change my address again.
Posts: 253
Good Answers: 19
#5
In reply to #4

Re: Air conditioning

07/30/2014 1:55 AM

D*%M this guy's good!!

I even understand it better now. (not being sarcastic, love the answer).

__________________
 Never seem more learned than the people you are with. Wear your learning like a pocket watch and keep it hidden. Do not pull it out to count the hours, but give the time when you are asked.(Lord Chesterfield)
Register to Reply
Crabtree
Guru

Join Date: Jul 2007
Location: Commissariat de Police, Nouvions, occupied France, 1942.
Posts: 2599
Good Answers: 77
#6
In reply to #3

Re: Air conditioning

07/30/2014 6:24 AM

Did you plug those abbreviations into an acronym finder database or are you expecting me to do it instead?

__________________
 Good moaning!
Register to Reply
SolarEagle
Guru

Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
Good Answers: 1817
#7
In reply to #3

Re: Air conditioning

07/30/2014 7:27 AM

SMBH = sensible cooling capacity in thousands of BTU's per hour.
TMBH= total cooling capacity in thousands of BTU's per hour.
EER= energy efficiency rating. BTU's per watt....
http://www.descoenergy.com/pdf/HVAC%20Formulas.pdf

__________________
 All living things seek to control their own destiny....this is the purpose of life
Register to Reply Score 1 for Good Answer
No more "Almost" Good Answers.
rsalaskar
Power-User

Join Date: Sep 2007
Location: I am located in Mumbai,India.
Posts: 125
Good Answers: 2
#9
In reply to #3

Re: Air conditioning

07/31/2014 12:26 AM

1TR = 1350 Watts - This means the airconditioner is using 1350 watts electrical energy for 1 TR cooling effect in one hour

1 TR = 3250 watts - This is cooling effect per hour for 1 TR capacity

__________________
 Rajesh
Register to Reply
Fredski
Guru

Join Date: Feb 2011
Posts: 7025
Good Answers: 207
#8

Re: Air Conditioning

07/30/2014 8:01 AM

they're a good idea
Register to Reply
markar
Power-User
United States - Member - US Navy Veteran

Join Date: Mar 2007
Location: Nothing sucks more than that moment during an argument when you realize you're wrong.
Posts: 301
Good Answers: 22
#10

Re: Air Conditioning

07/31/2014 8:44 PM

Residential Load Calculation (Manual J)

Commercial Load Calculation (Manual N)

__________________
 You never know when it will strike, but there comes a moment when you know that you just aren't going to do anything productive for the rest of the day.
Register to Reply
Register to Reply
Have a Different Question?
10 comments

Good Answers:

These comments received enough positive votes to make them "good answers".

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
Copy to Clipboard

Users who posted comments:

Crabtree (1); Fredski (1); lyn (1); markar (1); rsalaskar (1); sarfaras (1); SolarEagle (1); Tornado (2); Wrench twirler (1)

Previous in Forum: Want a Million Bucks?   Next in Forum: Diesel Generator

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Electrical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (82 right now)
Show Members
Advertisement